Second problem - Riley was given the step justification, but was
expected to fill out the green boxes to prove that
m³-n³ = (m-n) (m²+mn+n²) is an identity.
Please fill out the green boxes in the chart below using the justification on
the right. Show the work Riley would have needed in the box to make this a
true proof.
Hint - To make an exponent, highlight the number, the hold control and the
period button (Ctr + .)
(m-n) (m²+mn+n²)
Step 1:
Step 2:
Right side of the equation.
Multiplication (distribution)
Combine Like Terms
m³-n³ = (m-n) (m²+mn+n²) is an identity.